Alternator - Noise After Engine Shut-Down

Classification:
EL04-003

Reference:
NTB04-016

Date:
February 03, 2004

ALTERNATOR NOISE AFTER ENGINE SHUT OFF

APPLIED VEHICLES:
2002-04 Altima (L31)
2002-04 Sentra (B15)

APPLIED ENGINE:
QR25DE

IF YOU CONFIRM:

A low-tone whistling noise comes from the alternator for not more than 10 seconds after the engine is shut off.

ACTION:

Please note that this noise is:





^ Normal and is caused by a rotor "slow-down" function that is designed into the alternator

^ NOT a failure symptom, so do not replace the alternator for this